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Allis C oil pump gasket
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3rd generation View Drop Down
Bronze Level
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Joined: 09 Oct 2025
Location: Iowa
Points: 10 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 3rd generation Quote  Post ReplyReply Direct Link To This Post Topic: Allis C oil pump gasket
    Posted: 1 hour 28 minutes ago at 2:26pm
The gasket thickness provided in rebuild kit is .007” book says .001-.003” end play. Book says to lap body to reduce clearance. With out a gasket I have .003”
Thoughts on using .002 thick paper and coat with copper coat after lapping .002” off.
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 88817 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 6 minutes ago at 3:48pm
yes, you can use a piece of paper to make a gasket.. Dont use any sealer... little oil film will seal it.. The tighter the better.. If you can  get a couple thousandths off the housing, that would help.

These engines dont have but 15 psi of pressure when running... Can be less at idle, especially if you have excess clearance.. Spending some time to get the pump right is a good long term investment.


Edited by steve(ill) - 3 minutes ago at 3:51pm
Like them all, but love the "B"s.
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